Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:98:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:108:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:118:13: warning: unused variable ‘last’ [-Wunused-variable] int last = 0; ^ user.cpp:145:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[node].size(); j++) ^ user.cpp:96:9: warning: unused variable ‘Last’ [-Wunused-variable] int Last = 0, l = 0; ^ user.cpp: In function ‘void precalcNext()’: user.cpp:64:24: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] M[i][++j] = val; ^